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attract from lines

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This commit is contained in:
Jan Prochazka
2022-01-06 12:30:39 +01:00
parent b8ac4a5a06
commit 0795eab05b
1 changed files with 21 additions and 2 deletions
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23
packages/web/src/designer/SpringyAlg.ts
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@@ -1,3 +1,5 @@
import { intersectLineBox } from './designerMath';
const STIFFNESS = 400.0; const STIFFNESS = 400.0;
const REPULSION = 400.0; const REPULSION = 400.0;
const DAMPING = 0.5; const DAMPING = 0.5;
@@ -248,7 +250,7 @@ export class ForceDirectedLayout {
// callback should accept two arguments: Edge, Spring // callback should accept two arguments: Edge, Spring
eachEdge(callback: (node: Edge, spring: ForceDirectedSpring) => void) { eachEdge(callback: (node: Edge, spring: ForceDirectedSpring) => void) {
this.graph.edges.forEach(function (e) { this.graph.edges.forEach(e => {
callback(e, this.spring(e)); callback(e, this.spring(e));
}); });
} }
@@ -332,7 +334,24 @@ export class ForceDirectedLayout {
}); });
} }
attractFromLines() {} attractFromLines() {
this.eachEdge((edge, spring) => {
this.eachNode((node, point) => {
const overlaps = intersectLineBox(this.point(edge.source).position, this.point(edge.target).position, {
left: point.position.x - node.width / 2,
right: point.position.x + node.width / 2,
top: point.position.y - node.height / 2,
bottom: point.position.y + node.height / 2,
});
if (overlaps.length == 2) {
const mid = new Vector((overlaps[0].x + overlaps[1].x) / 2, (overlaps[0].y + overlaps[1].y) / 2);
var direction = point.position.subtract(mid); // .multiply(-1.0);
// console.log('OVERLAP', direction);
point.applyForce(direction.multiply(this.repulsion));
}
});
});
}
updateVelocity(timestep: number) { updateVelocity(timestep: number) {
this.eachNode((node, point) => { this.eachNode((node, point) => {